@Steamer14 This will depend strongly on your laptop's wireless adapter capability and the surrounding wireless interference. Technically speaking it should cover your ISP plan for sure in the best...

@rahzan Yes - to use the guest network of your router you don't need an extender, but if the signal is weak in some areas you'll need the RE to widen ist coverage.

@TheMeanFarmer Use this link and select your region to contact your local tech support.

@captainm27 If the RE is in proxy mode it could use a virtual MAC addresses and that could cause the outcome you've described. Refer this FAQ for more details on that matter. If that's the case you...

@rahzan If I understand correctly what you've described and your main router has a guest wireless network, you could take a look at this thread.

@TheMeanFarmer A sudden loss of power should not brick the router. It might have been a short-circuit (when the power cord has been chewed) that could cause an electronic component burn. In any case...